Filter.



' A. E. KRAUSE.

FILTER.

APPLICAJ'ION men AUG-26, 1914.

2 SHEETS-SHEET 1. W

A. E. KRAUSE.

FILTER.

APPLICATiON mso Aumzs. I914.

g M 9 O. 2 t

dm M L WS I flttozmeap if To all whom it may concern:

UNITED STATES PATENT OFFICE.

' ARTHUR E. KRAUSE, OF JERSEY CITYJNEW JERSEY.

Tmrma.

Be it known that I, ARTHUR E. KRAUsE, a

citizen of the United States of America, and a resident of Jersey City, in the county of- Hudson and State of New Jersey, have invented certain new and useful Improvements' in Filters, of which the following is a specification.

My invention relates to improvements in filters, particularly bag filters designed for the separation of one liquid from another, for example, the separation of oil or grease from water carrying'such oil or grease. The water of condensation of steam power plants commonly carries oil and grease derived from, the lubricant used inthe engine cylinders of the power plant, which oil or grease should be separated from the water before that water is reused in the boiler, or for Ice making, or other purposes; and the improved filter herein described is particularly intended for the extraction of oil or grease from such water of condensation.

Heretofore, bag filters have been used for separating such water of condensation from oil or grease carried thereby; the filter. bags become clogged with oil and. grease in a short time, and, as such filters have been constructed heretofore, the bags, 'when .so

clogged, must be removed for cleaning every few hours.

By the invention herein described I provide means for squeezing a large part of the oil or grease from the bags, without removal of the bags from .thefilter, and so makeit possible to use'these bags for a compara-j tively long time before their removal fromthe filter for cleaning is necessary, I My invention consists in novel means Tor squeezing the filter bags and thereby freeing-j them of thegreater part of their contained oil and grease, without removal of suchbags from the filter; and in various other fea- I. tures, as hereinafter described and pointed 45 out in the appended claims.

The objects of my invention are, -to free filter bags, whilein place within the filter, ofa large portion of the oil and grease car- -ried by them; to extend very greatly the period during which the filter bags may be retained within the filter, before removal of such bags for cleaning is required; to prospeciflcation of Letters Patent.

vide simple and. easily operated meansfor condition; to save-as great a proportion as posslble of the oil and grease, removed from I v Patented'July 6', 1915. Application'filed August 26, 1914. Serial No. 858,641.

the bags, and generally to make the filter simple, compact and 'of large capacity in proportion to-its size. I p

, I will now proceed to describe my invention with reference to the accompanying drawings, and will then point out the novel features/in claims.

In the drawings: Figure l showsa central vertical section through the filter casing and contained parts, the exterior piping being shown n elevation. 'Fig.-2 shows a vertical section through the exterior piping, the se-.

tion being taken on a plane at right angles to thatofFig. 1-. Fig. 3 shows a transverse, horizontal section of the filter taken on the ig; 1. Fig. 4; shows an eleV'ation, of one ofithe filter bag tubes. Fig..-.5

line m-wof shows an elevation and partial vertical 'sectlonof one of the filter bags. Fig. 6'is1a view similar to Fig. 1, but illustrates the use, I

a filter .suchas shown in Fig. 1, offiltermg material comprising bags or similar flexible envelops containing sponge; or 0th r compressible filtering material, Fig. 7

shows, on a larger scale than the preceding figure, a vertical section of one of the filter bafis employed in the construction of Fig. 6.

ferr-ing first to Figs. 1 to 5 inclus1vei In the drawings 1 designates the'casing .of the filter, such casing being usually provided with a removable top 1*.

are set, attheirlower ends, in suitable rec'esses formed in 'bosses 3 provided in the p 2 desig-f hates the filter tubes-, which have perforations as.hereinafterdescribedr These tubes lowerzportion of the filter casing '1. 4 desig nate s the filter bags, which are customarily of somesuitableporous fabric, such as-Turk ish toweling, though other fabric, wellknown to those skilled in the art, may be used. Preferably, the filter bags are of such length, with reference to the space provided for them within the casing 1, that said bags are crumpled as indicated in Fig. 1, so exposing a very large area of the filtering,

surface in proportion to the space occupied. 5 designates a plate mounted upon the verproper direction,

bottoms of such bags-,w'hich spring rings e'ngage shoulders of the'pl'ate 5 (such shoulders being formed, in the construction shown, by undercut extensionsof the recesses 5 The construction is such, that by turning the plate 5 is moved upward, compressing the filter bags against bosses 7 formed on the under side of'the top plate 1*, the compression thus exerted upon the bags serving to squeeze out of them the greater portion of the oil and grease carried thereby. The filter bag tubes 2 are provided with' perforations 2- through which oil squeezed out of the bags toward the center .m'ay'pass into such tubes and down through .them and thence out through slots 2 into "the oil well 1 formed in the lower portion of, the casing 1; and an escape duct 1 is prothe reverse direction the 1 to its original position,

vided in the casing '1, through which the oil so. collected in the bottom of the casing may be thrown 03 from time to time. Other oil, pressed outward from the filter bags, will flow down along theoutside of such bags, and around the outside of the plate 5 into the oil well; and still other oil, which may reach the recesses 5 of plate 5, will escape through'openings 5 provlded in said plate and so will reach the oil well.

To further facilitate the downward fiow of the oil, and to increase the efiective area of filtering surface, the tubes 2 are provided with longitudinal scores or grooves 2 (Fig. 4:). 3

When the bags have been compressed suffici'ently, by rotation of the screw shaft 6 in plate 5 is'lowered and owing to the engagement of the lower ends of the bags with the shoulders of plate 5, downward motion of said plate drags down the filter bags so that when such plate is seated against'the seat 1'? the bags are in the condition shown in Fig. 1.

In the normal filtering operation of the filter, water to be filtered enters at 10 (Fig. 2) and passes downward through duct 11 into the inlet 12 and thence through the filter bags into the filter bag tubes 2 and thence out through the water discharge connection 13 and duct 14 (Fig. 2) to the outlet 15; A

by-pass passage 16, 1s provided for connecting 10 and 15, together with valves 17 and ustre just previously as will be seen, the screw shaft 6 in the provided with a crank arm into the filter to heat the bags during the fluidity of the oil of the casing) a valved air and oil vent 24:

filter'may be filled with some suitable comare 18. In the upper position of these valves 17 and 18, the by-pass 16 is closedat both ends; while in the lower position of such valves 17 and 18 ducts 11 and 14: are closed by said valves, the by-pass 16 being open. In normal filtering operation the by-pass will be closed, the water or other liquid to be filtered passing through the filter as described, but when it is desired to squeeze the filter bags the valves 17 and 18 will customarily be operated to close ducts 11 and l t and to open the bypass, preparatory to raising the compression plate 5; and after such compression plate 5 is lowered again, the by-pass will be closed, and the ducts 11 and 14 opened.

. For convenience in rotating the screw shaft 6 I have provided a bevel gear 19 with which intermeshes a bevel pinion 20 21 by which it may be rotated.

The bosses 7 of the'top plate 1 are customarily of slightly spherical contour on their lower faces as indicated in Fig. 1, this construction being preferred in order that there maybe no adhesion of the tops of filter bags to these bosses, and also to make the compression of the bags when said bags are pressed between the plate 5 and the bosses 7 greater near the center of such bags than at the outside, so that the oil or grease held by the bags may be forced outward. If desired, a connection 22 may be provided through which steam may be introduced pressing operation and so to increase the and grease carried by such bags. In such case, the casing is preferably provided with asafety valve 23.

At some suitable point in the casing (in the construction shown, in the top plate 1 is provided. This vent permits the expulsion of air when first filling the filter, and also permits the drawing off of oil which may, from time to time" collect on the top of the water in the filter.

The filter bags employed in my improved pressible, and, preferably, elastic filtering material, such for example as sponge. This is illustrated in Figs. 6 and 7, wherein the filter shown is of the same general construction as that shown in Figs. 1-5 inclusive, that the bags, designated in Figs. 6 by numerals 4 have an internal tubular portion 4* adapted to surround and fit more or less closely over the tubes 2, the spaces between such tubular portions 4 and the outsides of the bags being filled with 1. more or less tightly'packed elastic filtering such bags.

'such bag'is'mounted, a bae 'of said bag,

I ternal tubular portion .4 of each filter bag is preferably provided at its lower end with a flap 4 extending to the'outside of the bag, whereby it' is held to the plate 5 by the same spring ring which holds the outsidev of the bag to the plate 5.

shown in Figs. 15 inclusive, except that the bags containing elastic absorbent filtering material will naturally have a much greater capacity for oil absorption than will the bags shown in Figs. 1-5 inclusiv In squeezing the oil or The operation of this filter is precisely the same as that ofthe-filter 7,the operation is precisely the same as that described with reference to the construction of Figs. 1-5 inclusive, except that the plate 5, in moving upward compresses, not only thebags themselves but also the compres sible and elastic filtering material 4 within- When the plate 5 is lowered again the bags will be drawn out as in the construction and the filtering material 4 within the bags will expand because'of its elastic. nature.

I do not limit 'myselfto the use of filter bags composed of vegetable or animal fiber, particularly in the case of the filter shown in Figs. 6 and 7, wherein the main filtering material is the sponge, or other suitable material withinthe bags, the bags themselves may, in some-cases at least,be formed of woven wire material or other material of a non-organic nature. What I claim is y 1. A 'filter comprising in combination a casing, a tubular perforate filter bag-support therein, a filter bagmounted upon such f support, andmeans for compressing such ag endwise while in place on such support, and thereby squeezing from such bag more or less liquid material held thereby.

2. A filter comprising a bag of compressible filtering material, a'sup ort upon which ing. for one end of said ba such plate movable toward and from said acking, and means for so moving such plate; whereby by-moving the plate toward the backing such filter bag may be compressed between the plate and backing.

3. A filter comprising a bag of compress1- suchbag is mounted, a backing for one end of said bag, a plate engaging and secured to the other end of said bag,

bymoving the plate toward thebacking such filter bag may be compressed between the plate and backing, and whereby by reverse movement of such plate the filter bag is extended again.

.4. A filter comprisin casing, a plurality of tu in combination a ular filter bag supshown in Figs. 1'5 inclusive,

a plate engaging the. other end such plate mov-' able toward and from said backing, and; 'means for so moving such plate; whereby gorts therein, filter ba s on said supports, a a'ckin'g for one end 0 eachsuch filter bag,

a compression plate engaging the other ends of such bags and movable toward and from casing, a plurality of tubular filter bag supports therein, abacking for one end of each such filter cured to the other ends of such bags and movable toward and from the said backings, and means for so moving such compression bag, a compression plate engagingand sefilter bags on said supports,

"plate; whereby by moving the plate toward the backing such filter bags may becompressed between the plate and the backing, and whereby plate the filter bags are extended again.

'6. A filter comprising in combination a casing, a plurality of'tubular filter bag supports therein, filter'bags on'said sup orts, a backing for one end of each such fil a compression plate engaging the other en s of such bags and movable toward and from the said backing, a screw shaft engaging said compression ,plate and so moving the latter, and means for rotating such -screw.

7 A filter comprising a bag of compressi- .ble filtering material, a support upon which such bag is mounted, a backing for one end of saidbag, a plate engaging the other end of said bag and receiving theother end of such spring means holding such end in such reent'rantlrecess, whereby-that end of the bag and the said-plate are connected, such plate movable toward and from said backing,

bag, and

by reverse movement of such er ba having a. rentrant recess of the bag. I

bag of'compressible filtering material,'a 'tubular perforate supportfor such bag, adapt-' ed to fit'therewithin and having, within the range. of such-support to be-covered by such bag, perforations adapted to permit the filtrate to flow. into such support, such support 115.

having also, intended to charge opening, such support being grooved longitudinally "on its exterior through the range of the first mentioned series of perforations' of such support; and meansfor compressing the filter bag while in place on such support. I :1 9. A filtering element comprising a" con:

. tainer having an outer collapsible envelop and a central tubular portion,

sible and elastic filtering material between such tubular portionand the beyond the range of the support be occupied 'by the bag, a dis- \and compres outer envelop. T

10. A filter comprisinga filtering element v having anouter envelop and having also an internal tub ularportion, and havingelastic and compressible filtering material within the space between such tubular portion and a support upon which filtering element having also and having material .within the space between such tubular porin combination with such filtering element is mounted, and means. for compressing such envelop, while in place on tion and outer envelop,

such support, and thereby squeezing out of the filtering material more or less liquid material held thereby.

. 12; A filter comprlsing a filtering element,

having an outer collapsible envelop and a rate filter element .central tubular portion and compressible and elastic filtering material between such tubular portion and the outer envelop, in combination with a casing, a tubular perfosupport therein, passing through the central tub lar portion of such filtering element, the e'nd portion of such tubular portion of the filtering element bex as being therebypressed outward ,ing secured to such tubular support and for compressing such filtering ele means ment endwise while in' place on such support, and thereby squeezing from such filtering element more or less liquid held thereby.

' 13. A filter comprising a bag of compressible filtering material, a support upon which such bag is mounted, a backing for one end of said bag, a compressing member engaging the other end of said bag, such compressing member movable toward'and from said backing, such compressing member whereby by moving such compressing member toward the backing such filt'er bag may be compressed between the compressing member and backing, the said backing sloping backwardly from its portion nearest the center of the bag, whereby as the bag is pressed against such backing greater pressure is exerted on the central portion of the bag than on the side portions, the liquid .heldl by the bag 14. A filter comprising in combination a tubular-perforate filter bag support, a filter bag comprising an outer envelop and an internal tubular portion, the latter fitting over such filter bag support, and means for compressing such bag endwise while in place on such support, and thereby squeezing from such bag more or less liquid material held thereby, such filter bag support having longitudinal grooves, ere

tering surface of the tubular portion of the bag in contact with said tubular filter bag and its contents, endwise I portion, a support and means for so moving- 15. A filtering element comprising M. outer envelop and an internal tubular portion, connected at one end to such outer envelop, and having at its otherend a flap extending across and substantially closing the other end of such envelop.

16. A filtering element comprising an outer envelop and an internal tubular portion, connected at one end-to such outer envelop, and having at its other end a flap extending across and substantially closing the other end of such envelop, and elastic compressible filtering material within the space between such tubu'li' portion and outer envelop.

' 17; Afilter comprising a bag of compressible filtering material, such bag consisting of an outer envelop, and an internal tubular upon which such bag is mounted, a backing for one end of said bag,

a plate engaging the other end of said bag,

' and having a reentrant recess, the said tubular portion of said bag having at one end a [lap extending across the end of the envelop and folded around such end, spring means holding both such end of the envelop of the a bag and the edge portion of such flap of the bag within such rentrant' recess, whereby the bag is connected to theplate, such plate movable toward and from said backing, and means for'so moving said plate.

18. A filter comprising a bag of compressible filtering material, such bag consisting of an outer envelop, portion, a support upon which such bag is mounted, a backing for one end of said bag, a plate engaging the other end of said bag, and having a reentrant recess, the said tubular portion of said bag having atone end a flap extending across the end of the envelop and folded around such end, spring means holding both such end of the envelop of the bag and the edge portion of such flap of the bag within such reentrant recess, whereby the bag is connected to the plate, such plate movable toward and from said backing, and means for so moving said plate, and elastic and compressible filtering material within the bag and between the said tubular portion of the bag and the outer envelop of the bag.

thereby.

a 20. A filter comprising abagof compressis ble filtering material, a support upon which such bag is mounted, a part of the filter structure for compressing the material ofsuch bag endwise while inplaee upon such support and thereby squeezand means included as .terial held thereby.

ing out of the bag more or less liquid ma 21. A filter comprising a bag of compressi-v ble filtering material, a support upon which such bag is mounted, and means for compressing such bag endwise while in .place on such support, and thereby squeezing out of V the bag more or less liquid material held thereby, said means comprising members at the ends of said bag between which the 10 material of said bag can be compressed. In testimony whereof- I have signed this 

